SortStack #471 — 2027-09-23

By year · Order from earliest to most recent.

1. The Prophet Muhammad migrates from Mecca to Medina 622

   This journey, the Hijra, marks year one of the Islamic calendar — which is lunar, so it gains on the solar calendar by about eleven days per year.

2. Leonardo da Vinci begins painting the Mona Lisa 1503

   It was a minor celebrity until 1911, when an Italian handyman stole it from the Louvre — the theft, and the two-year hunt, made it the most famous painting on Earth.

3. The Empire State Building opens in New York 1931

   It went up in just 410 days, ahead of schedule and under budget — then sat so vacant during the Depression that locals dubbed it the 'Empty State Building.'

4. Hijacked airliners destroy the Twin Towers in New York 2001

   The attacks grounded all civilian flights over the US for days — the first time in aviation history American skies were essentially emptied.

5. Lehman Brothers collapses, deepening the global financial crisis 2008

   With over $600 billion in assets, it remains the largest bankruptcy filing in American history.

6. The Philae probe makes the first-ever landing on a comet 2014

   Philae's harpoons failed and it bounced twice — the first bounce lasted nearly two hours in the comet's feeble gravity before it settled in a shadowy crevice.

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